#guide, #air_gapped_footer {
  .u-text-center {
    text-align: center;
  }
  .u-mono {
    font-family:Monaco, 'DejaVu Sans Mono', 'Bitstream Vera Sans Mono', 'Lucida Console', monospace;
  }
  .u-strikethrough {
    text-decoration: line-through;
  }
  .u-space-between {
    display: flex;
    justify-content: space-between;
  }
}